/*
Copyright 2008-2011 Clipperz Srl
This file is part of Clipperz's Javascript Crypto Library.
Javascript Crypto Library provides web developers with an extensive
and efficient set of cryptographic functions. The library aims to
obtain maximum execution speed while preserving modularity and
reusability.
For further information about its features and functionalities please
refer to http://www.clipperz.com
* Javascript Crypto Library is free software: you can redistribute
it and/or modify it under the terms of the GNU Affero General Public
License as published by the Free Software Foundation, either version
3 of the License, or (at your option) any later version.
* Javascript Crypto Library is distributed in the hope that it will
be useful, but WITHOUT ANY WARRANTY; without even the implied
warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
See the GNU Affero General Public License for more details.
* You should have received a copy of the GNU Affero General Public
License along with Javascript Crypto Library. If not, see
<http://www.gnu.org/licenses/>.
*/
try { if (typeof(Clipperz.ByteArray) == 'undefined') { throw ""; }} catch (e) {
throw "Clipperz.Crypto.PRNG depends on Clipperz.ByteArray!";
}
if (typeof(Clipperz.Crypto) == 'undefined') { Clipperz.Crypto = {}; }
if (typeof(Clipperz.Crypto.SHA) == 'undefined') { Clipperz.Crypto.SHA = {}; }
Clipperz.Crypto.SHA.VERSION = "0.3";
Clipperz.Crypto.SHA.NAME = "Clipperz.Crypto.SHA";
MochiKit.Base.update(Clipperz.Crypto.SHA, {
'__repr__': function () {
return "[" + this.NAME + " " + this.VERSION + "]";
},
'toString': function () {
return this.__repr__();
},
//-----------------------------------------------------------------------------
'rotateRight': function(aValue, aNumberOfBits) {
//Clipperz.Profile.start("Clipperz.Crypto.SHA.rotateRight");
var result;
result = (aValue >>> aNumberOfBits) | (aValue << (32 - aNumberOfBits));
//Clipperz.Profile.stop("Clipperz.Crypto.SHA.rotateRight");
return result;
},
'shiftRight': function(aValue, aNumberOfBits) {
//Clipperz.Profile.start("Clipperz.Crypto.SHA.shiftRight");
var result;
result = aValue >>> aNumberOfBits;
//Clipperz.Profile.stop("Clipperz.Crypto.SHA.shiftRight");
return result;
},
//-----------------------------------------------------------------------------
'safeAdd': function() {
//Clipperz.Profile.start("Clipperz.Crypto.SHA.safeAdd");
var result;
var i, c;
result = arguments[0];
c = arguments.length;
for (i=1; i<c; i++) {
var lowerBytesSum;
lowerBytesSum = (result & 0xffff) + (arguments[i] & 0xffff);
result = (((result >> 16) + (arguments[i] >> 16) + (lowerBytesSum >> 16)) << 16) | (lowerBytesSum & 0xffff);
}
//Clipperz.Profile.stop("Clipperz.Crypto.SHA.safeAdd");
return result;
},
//-----------------------------------------------------------------------------
'sha256_array': function(aValue) {
//Clipperz.Profile.start("Clipperz.Crypto.SHA.sha256_array");
var result;
var message;
var h0, h1, h2, h3, h4, h5, h6, h7;
var k;
var messageLength;
var messageLengthInBits;
var _i, _c;
var charBits;
var rotateRight;
var shiftRight;
var safeAdd;
var bytesPerBlock;
var currentMessageIndex;
bytesPerBlock = 512/8;
rotateRight = Clipperz.Crypto.SHA.rotateRight;
shiftRight = Clipperz.Crypto.SHA.shiftRight;
safeAdd = Clipperz.Crypto.SHA.safeAdd;
charBits = 8;
h0 = 0x6a09e667;
h1 = 0xbb67ae85;
h2 = 0x3c6ef372;
h3 = 0xa54ff53a;
h4 = 0x510e527f;
h5 = 0x9b05688c;
h6 = 0x1f83d9ab;
h7 = 0x5be0cd19;
k = [ 0x428a2f98, 0x71374491, 0xb5c0fbcf, 0xe9b5dba5, 0x3956c25b, 0x59f111f1, 0x923f82a4, 0xab1c5ed5,
0xd807aa98, 0x12835b01, 0x243185be, 0x550c7dc3, 0x72be5d74, 0x80deb1fe, 0x9bdc06a7, 0xc19bf174,
0xe49b69c1, 0xefbe4786, 0x0fc19dc6, 0x240ca1cc, 0x2de92c6f, 0x4a7484aa, 0x5cb0a9dc, 0x76f988da,
0x983e5152, 0xa831c66d, 0xb00327c8, 0xbf597fc7, 0xc6e00bf3, 0xd5a79147, 0x06ca6351, 0x14292967,
0x27b70a85, 0x2e1b2138, 0x4d2c6dfc, 0x53380d13, 0x650a7354, 0x766a0abb, 0x81c2c92e, 0x92722c85,
0xa2bfe8a1, 0xa81a664b, 0xc24b8b70, 0xc76c51a3, 0xd192e819, 0xd6990624, 0xf40e3585, 0x106aa070,
0x19a4c116, 0x1e376c08, 0x2748774c, 0x34b0bcb5, 0x391c0cb3, 0x4ed8aa4a, 0x5b9cca4f, 0x682e6ff3,
0x748f82ee, 0x78a5636f, 0x84c87814, 0x8cc70208, 0x90befffa, 0xa4506ceb, 0xbef9a3f7, 0xc67178f2];
message = aValue;
messageLength = message.length;
//Pre-processing:
message.push(0x80); // append a single "1" bit to message
_c = (512 - (((messageLength + 1) * charBits) % 512) - 64) / charBits;
if (_c < 0) {
_c = _c + (512 / charBits);
}
for (_i=0; _i<_c; _i++) {
message.push(0x00); // append "0" bits until message length ≡ 448 ≡ -64 (mod 512)
}
messageLengthInBits = messageLength * charBits;
message.push(0x00); // the 4 most high byte are alway 0 as message length is represented with a 32bit value;
message.push(0x00);
message.push(0x00);
message.push(0x00);
message.push((messageLengthInBits >> 24) & 0xff);
message.push((messageLengthInBits >> 16) & 0xff);
message.push((messageLengthInBits >> 8) & 0xff);
message.push( messageLengthInBits & 0xff);
currentMessageIndex = 0;
while(currentMessageIndex < message.length) {
var w;
var a, b, c, d, e, f, g, h;
w = Array(64);
_c = 16;
for (_i=0; _i<_c; _i++) {
var _j;
_j = currentMessageIndex + _i*4;
w[_i] = (message[_j] << 24) | (message[_j + 1] << 16) | (message[_j + 2] << 8) | (message[_j + 3] << 0);
}
_c = 64;
for (_i=16; _i<_c; _i++) {
var s0, s1;
s0 = (rotateRight(w[_i-15], 7)) ^ (rotateRight(w[_i-15], 18)) ^ (shiftRight(w[_i-15], 3));
s1 = (rotateRight(w[_i-2], 17)) ^ (rotateRight(w[_i-2], 19)) ^ (shiftRight(w[_i-2], 10));
w[_i] = safeAdd(w[_i-16], s0, w[_i-7], s1);
}
a=h0; b=h1; c=h2; d=h3; e=h4; f=h5; g=h6; h=h7;
_c = 64;
for (_i=0; _i<_c; _i++) {
var s0, s1, ch, maj, t1, t2;
s0 = (rotateRight(a, 2)) ^ (rotateRight(a, 13)) ^ (rotateRight(a, 22));
maj = (a & b) ^ (a & c) ^ (b & c);
t2 = safeAdd(s0, maj);
s1 = (rotateRight(e, 6)) ^ (rotateRight(e, 11)) ^ (rotateRight(e, 25));
ch = (e & f) ^ ((~e) & g);
t1 = safeAdd(h, s1, ch, k[_i], w[_i]);
h = g;
g = f;
f = e;
e = safeAdd(d, t1);
d = c;
c = b;
b = a;
a = safeAdd(t1, t2);
}
h0 = safeAdd(h0, a);
h1 = safeAdd(h1, b);
h2 = safeAdd(h2, c);
h3 = safeAdd(h3, d);
h4 = safeAdd(h4, e);
h5 = safeAdd(h5, f);
h6 = safeAdd(h6, g);
h7 = safeAdd(h7, h);
currentMessageIndex += bytesPerBlock;
}
result = new Array(256/8);
result[0] = (h0 >> 24) & 0xff;
result[1] = (h0 >> 16) & 0xff;
result[2] = (h0 >> 8) & 0xff;
result[3] = h0 & 0xff;
result[4] = (h1 >> 24) & 0xff;
result[5] = (h1 >> 16) & 0xff;
result[6] = (h1 >> 8) & 0xff;
result[7] = h1 & 0xff;
result[8] = (h2 >> 24) & 0xff;
result[9] = (h2 >> 16) & 0xff;
result[10] = (h2 >> 8) & 0xff;
result[11] = h2 & 0xff;
result[12] = (h3 >> 24) & 0xff;
result[13] = (h3 >> 16) & 0xff;
result[14] = (h3 >> 8) & 0xff;
result[15] = h3 & 0xff;
result[16] = (h4 >> 24) & 0xff;
result[17] = (h4 >> 16) & 0xff;
result[18] = (h4 >> 8) & 0xff;
result[19] = h4 & 0xff;
result[20] = (h5 >> 24) & 0xff;
result[21] = (h5 >> 16) & 0xff;
result[22] = (h5 >> 8) & 0xff;
result[23] = h5 & 0xff;
result[24] = (h6 >> 24) & 0xff;
result[25] = (h6 >> 16) & 0xff;
result[26] = (h6 >> 8) & 0xff;
result[27] = h6 & 0xff;
result[28] = (h7 >> 24) & 0xff;
result[29] = (h7 >> 16) & 0xff;
result[30] = (h7 >> 8) & 0xff;
result[31] = h7 & 0xff;
//Clipperz.Profile.stop("Clipperz.Crypto.SHA.sha256_array");
return result;
},
//-----------------------------------------------------------------------------
'sha256': function(aValue) {
//Clipperz.Profile.start("Clipperz.Crypto.SHA.sha256");
var result;
var resultArray;
var valueArray;
valueArray = aValue.arrayValues();
resultArray = Clipperz.Crypto.SHA.sha256_array(valueArray);
result = new Clipperz.ByteArray(resultArray);
//Clipperz.Profile.stop("Clipperz.Crypto.SHA.sha256");
return result;
},
//-----------------------------------------------------------------------------
'sha_d256': function(aValue) {
//Clipperz.Profile.start("Clipperz.Crypto.SHA.sha_d256");
var result;
var resultArray;
var valueArray;
valueArray = aValue.arrayValues();
resultArray = Clipperz.Crypto.SHA.sha256_array(valueArray);
resultArray = Clipperz.Crypto.SHA.sha256_array(resultArray);
result = new Clipperz.ByteArray(resultArray);
//Clipperz.Profile.stop("Clipperz.Crypto.SHA.sha256");
return result;
},
//-----------------------------------------------------------------------------
__syntaxFix__: "syntax fix"
});